经口气管插管的留置时间一般不超过多长时间().
A.72小时
B.5天
C.7天
D.10天
E.24小时
参考答案:C
— Was it not until last week ______ he decided to give up smoking?
— No. He began _____ he saw the new film last month.
A.when; as soon as
B.that; directly
C.did; after
D.that; till
肝细胞癌的X线表现有()。
A.X线平片一般不用于诊断
B.钡剂造影可用于观察合并门静脉高压的肝细胞癌
C.肿瘤供血动脉扩张,动脉分支变形、移位、扭曲及包绕
D.肿瘤新生血管增多
E.门静脉癌栓,表现为门静脉内充盈缺损